Michael Moore has been an outspoken advocate for all kinds of gun control for years.
He posted a Facebook post on October 4th declaring how he would actually repeal and replace the Second Amendment:
I, Michael Moore, along with all who support an end to this epidemic of gun violence, propose a new Amendment to our Constitution that repeals the ancient and outdated 2nd Amendment (which was written before bullets and revolvers were even invented), and replaces it with a new 28th Amendment that guarantees States can have State militias (a.k.a. State National Guards which are made up of citizen-soldiers who are called upon in times of natural disasters or other State emergencies), allows individuals to use guns for sport and gathering food, and guarantees everyone the right to be free of, and protected from, gun violence (i.e., the public’s safety comes ahead of an individual’s right to own and
